Fund for Population Activities, the World Health Organization, and UNESCO, ought to give high priority to helping their member states learn from one another about population goals and the conduct of fertility-reducing programs. Information exchange among countries has been one of the most successful activities of the United Nations agencies in other fields, and these agencies are uniquely qualified for this function. Among the promising possibilities is the "confrontation" technique of the Organization for Economic Cooperation and Development. 2. The United Nations Development Program and other U.N. agencies and regional organizations, such as the Pan American Health Organization and the Organization of American States, are urged to greatly strengthen their staffs and procedures to increase the effectiveness of their technical assistance for fertility-reduction programs. Multilateral assistance through intergovernmental agencies will often be more acceptable than bilateral assistance to developing countries; therefore it is important to improve its quality. 3. A United Nations agency (such as the World Bank) should take the lead in preparing a world budget of the needs during the next 2 decades to carry out programs of fertility and mortality reduction in all developing countries. Such a world budget would be comparable to the Indicative World Plan for Agricultural Development prepared by the Food and Agricultural Organization. It is suggested that it include, among other things, provision for research; training; collection and analysis of demographic data; public education and communications; contraceptive materials; services of physicians, paramedical and other personnel; transportation and other expenses; program evaluation; and welfare policies that would reduce the desired numbers of children and are feasible in different countries. It will be important to try to forecast alternative sequences of program development and identify potential sources of funds and modes of financing; particularly the requirements for technical and financial assistance among countries. 4. We applaud the work of foundations, voluntary associations, and other private organizations and urge that they be encouraged in research and action programs for fertility reduction.le without rising levels of education and communication.